Note
Go to the end to download the full example code.
Ship drift
from datetime import datetime
from opendrift.models.shipdrift import ShipDrift
o = ShipDrift(loglevel=20)
o.add_readers_from_list([
'https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml',
'https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc',
'https://thredds.met.no/thredds/dodsC/cmems/mywavewam3km/dataset-wam-arctic-1hr3km-be.ncml'
])
20:13:10 INFO opendrift.models.basemodel:515: OpenDriftSimulation initialised (version 1.12.0 / v1.12.0-26-g390e945)
Seed ship elements at defined position and time Note: beam/length ratio is larger than allowed, but is then clipped internally
o.seed_elements(lon=5.0, lat=63.0, radius=1000, number=1000,
time=datetime.utcnow(),
length=80.0, beam=20.0, height=9.0, draft=4.0)
20:13:10 WARNING opendrift.models.shipdrift:181: Ratio of beam to length should be in range 0.12 to 0.18, given range is 0.25-0.25. Using border value.
20:13:10 INFO opendrift.models.basemodel.environment:218: Adding a dynamical landmask with max. priority based on assumed maximum speed of 2.0 m/s. Adding a customised landmask may be faster...
20:13:13 INFO opendrift.models.basemodel.environment:245: Fallback values will be used for the following variables which have no readers:
20:13:13 INFO opendrift.models.basemodel.environment:248: sea_surface_wave_stokes_drift_x_velocity: 0.000000
20:13:13 INFO opendrift.models.basemodel.environment:248: sea_surface_wave_stokes_drift_y_velocity: 0.000000
20:13:13 INFO opendrift.models.basemodel.environment:248: sea_surface_wave_significant_height: 0.000000
20:13:13 INFO opendrift.models.basemodel.environment:248: sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
Running model
o.run(steps=24, stop_on_error=True)
20:13:13 INFO opendrift.models.basemodel:935: Using existing reader for land_binary_mask
20:13:13 INFO opendrift.models.basemodel:946: All points are in ocean
20:13:13 INFO opendrift.models.basemodel:2035: 2024-12-12 20:13:10.031953 - step 1 of 24 - 1000 active elements (0 deactivated)
20:13:13 INFO opendrift.readers:58: Opening file with xr.open_dataset
20:13:19 INFO opendrift.readers.reader_netCDF_CF_generic:337: Detected dimensions: {'x': 'x', 'y': 'y', 'time': 'time'}
20:13:19 INFO opendrift.readers:58: Opening file with xr.open_dataset
20:13:20 INFO opendrift.readers.reader_netCDF_CF_generic:337: Detected dimensions: {'time': 'time', 'x': 'x', 'y': 'y'}
20:13:20 INFO opendrift.readers:58: Opening file with xr.open_dataset
20:13:23 INFO opendrift.readers.reader_netCDF_CF_generic:337: Detected dimensions: {'y': 'rlat', 'x': 'rlon', 'time': 'time'}
20:13:25 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:25 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:27 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:27 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:28 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:28 INFO opendrift.models.basemodel:2035: 2024-12-12 21:13:10.031953 - step 2 of 24 - 1000 active elements (0 deactivated)
20:13:30 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:30 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:31 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:31 INFO opendrift.models.basemodel:2035: 2024-12-12 22:13:10.031953 - step 3 of 24 - 1000 active elements (0 deactivated)
20:13:33 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:33 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:33 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:33 INFO opendrift.models.basemodel:2035: 2024-12-12 23:13:10.031953 - step 4 of 24 - 1000 active elements (0 deactivated)
20:13:35 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:35 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:36 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:36 INFO opendrift.models.basemodel:2035: 2024-12-13 00:13:10.031953 - step 5 of 24 - 1000 active elements (0 deactivated)
20:13:39 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:39 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:39 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:39 INFO opendrift.models.basemodel:2035: 2024-12-13 01:13:10.031953 - step 6 of 24 - 1000 active elements (0 deactivated)
20:13:41 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:41 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:41 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:41 INFO opendrift.models.basemodel:2035: 2024-12-13 02:13:10.031953 - step 7 of 24 - 1000 active elements (0 deactivated)
20:13:43 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:43 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:43 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:43 INFO opendrift.models.basemodel:2035: 2024-12-13 03:13:10.031953 - step 8 of 24 - 1000 active elements (0 deactivated)
20:13:45 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:45 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:46 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:46 INFO opendrift.models.basemodel:2035: 2024-12-13 04:13:10.031953 - step 9 of 24 - 1000 active elements (0 deactivated)
20:13:47 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:47 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:48 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:48 INFO opendrift.models.basemodel:2035: 2024-12-13 05:13:10.031953 - step 10 of 24 - 1000 active elements (0 deactivated)
20:13:50 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:50 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:50 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:50 INFO opendrift.models.basemodel:2035: 2024-12-13 06:13:10.031953 - step 11 of 24 - 1000 active elements (0 deactivated)
20:13:52 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:52 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:53 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:53 INFO opendrift.models.basemodel:2035: 2024-12-13 07:13:10.031953 - step 12 of 24 - 1000 active elements (0 deactivated)
20:13:55 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:55 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:56 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:56 INFO opendrift.models.basemodel:2035: 2024-12-13 08:13:10.031953 - step 13 of 24 - 1000 active elements (0 deactivated)
20:13:57 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:57 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:58 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:58 INFO opendrift.models.basemodel:2035: 2024-12-13 09:13:10.031953 - step 14 of 24 - 1000 active elements (0 deactivated)
20:14:00 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:00 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:00 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:00 INFO opendrift.models.basemodel:2035: 2024-12-13 10:13:10.031953 - step 15 of 24 - 1000 active elements (0 deactivated)
20:14:02 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:02 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:03 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:03 INFO opendrift.models.basemodel:2035: 2024-12-13 11:13:10.031953 - step 16 of 24 - 1000 active elements (0 deactivated)
20:14:04 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:04 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:06 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:06 INFO opendrift.models.basemodel:2035: 2024-12-13 12:13:10.031953 - step 17 of 24 - 1000 active elements (0 deactivated)
20:14:07 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:07 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:08 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:08 INFO opendrift.models.basemodel:2035: 2024-12-13 13:13:10.031953 - step 18 of 24 - 1000 active elements (0 deactivated)
20:14:10 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:10 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:11 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:11 INFO opendrift.models.basemodel:2035: 2024-12-13 14:13:10.031953 - step 19 of 24 - 1000 active elements (0 deactivated)
20:14:12 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:12 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:13 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:13 INFO opendrift.models.basemodel:2035: 2024-12-13 15:13:10.031953 - step 20 of 24 - 1000 active elements (0 deactivated)
20:14:14 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:14 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:15 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:15 INFO opendrift.models.basemodel:2035: 2024-12-13 16:13:10.031953 - step 21 of 24 - 1000 active elements (0 deactivated)
20:14:17 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:17 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:18 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:18 INFO opendrift.models.basemodel:2035: 2024-12-13 17:13:10.031953 - step 22 of 24 - 1000 active elements (0 deactivated)
20:14:19 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:19 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:20 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:20 INFO opendrift.models.basemodel:2035: 2024-12-13 18:13:10.031953 - step 23 of 24 - 1000 active elements (0 deactivated)
20:14:21 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:21 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:22 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:22 INFO opendrift.models.basemodel:2035: 2024-12-13 19:13:10.031953 - step 24 of 24 - 1000 active elements (0 deactivated)
20:14:24 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:24 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:24 INFO opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
Print and plot results
print(o)
o.plot(linecolor='orientation')
#o.animation(color='orientation', markersize=20, filename="orientation.gif", legend=['left','right'],colorbar=False,cmap='bwr')
o.animation(color='orientation', legend=['left','right'], markersize=20, colorbar=False, cmap='bwr')
===========================
--------------------
Reader performance:
--------------------
global_landmask
0:00:00.0 total
0:00:00.0 preparing
0:00:00.0 reading
0:00:00.0 masking
--------------------
https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml
0:00:14.0 total
0:00:00.0 preparing
0:00:13.8 reading
0:00:00.0 interpolation
0:00:00.0 interpolation_time
0:00:00.1 rotating vectors
0:00:00.0 masking
--------------------
https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc
0:00:27.3 total
0:00:00.0 preparing
0:00:27.1 reading
0:00:00.2 interpolation
0:00:00.0 interpolation_time
0:00:00.1 rotating vectors
0:00:00.0 masking
--------------------
https://thredds.met.no/thredds/dodsC/cmems/mywavewam3km/dataset-wam-arctic-1hr3km-be.ncml
0:00:18.7 total
0:00:00.0 preparing
0:00:18.5 reading
0:00:00.0 interpolation
0:00:00.0 interpolation_time
0:00:00.2 rotating vectors
0:00:00.0 masking
--------------------
Performance:
1:14.8 total time
3.4 configuration
0.0 preparing main loop
0.0 moving elements to ocean
1:11.4 main loop
0.5 updating elements
0.0 cleaning up
--------------------
===========================
Model: ShipDrift (OpenDrift version 1.12.0)
1000 active ShipObject particles (0 deactivated, 0 scheduled)
-------------------
Environment variables:
-----
land_binary_mask
1) global_landmask
-----
x_sea_water_velocity
y_sea_water_velocity
1) https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml
2) https://thredds.met.no/thredds/dodsC/cmems/mywavewam3km/dataset-wam-arctic-1hr3km-be.ncml
-----
x_wind
y_wind
1) https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc
-----
sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment
sea_surface_wave_significant_height
sea_surface_wave_stokes_drift_x_velocity
sea_surface_wave_stokes_drift_y_velocity
1) https://thredds.met.no/thredds/dodsC/cmems/mywavewam3km/dataset-wam-arctic-1hr3km-be.ncml
Discarded readers:
Time:
Start: 2024-12-12 20:13:10.031953 UTC
Present: 2024-12-13 20:13:10.031953 UTC
Calculation steps: 24 * 1:00:00 - total time: 1 day, 0:00:00
Output steps: 25 * 1:00:00
===========================
20:14:58 INFO opendrift.models.basemodel:4613: Saving animation to /root/project/docs/source/gallery/animations/example_shipdrift_0.gif...
20:16:43 INFO opendrift.models.basemodel:3037: Time to make animation: 0:01:48.347243
Total running time of the script: (3 minutes 44.489 seconds)